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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b910cde3e3cffd2226ec807ef9dca23958daac1b322f8ed18548cfea2c34e6dc' 
  AND token = 'YMlWM217UV1VMhc6Il1Bo53PkX6cLJNCKvVzPNEtcks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}