Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eec57bc79896f227e48dc9843d27dad718f0b5123d0d38941fa2b1845ffbe862' 
  AND token = 'wtSd0fOdAaANQAZIYlAn85jBkOmuv3cCsWb/5Z8AT5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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