Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '480a767d791e24feb12dd22cb01f40eed0383f5a07b9d8ca34b4cced9c7c3bd2' 
  AND token = 'ueo6acivZ6+DFeVDAsGn1k+FcnfI1yEHMLZmg0hIEec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}