Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e27ce1c94243f71b4c7d1f6ea6837d0a9ccb15dd3366d5ea5026b1f10051d93d' 
  AND token = 'NPMk4uFQVpfQXiSRPWYW81KwJAVuVf6dSk5wDds1Fnk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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