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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8bbdeee9087c6190ea355ffe44a17021384a248d97b1ba3684b20e05664633e' 
  AND token = 'QoYNfTgGaMFtiS8YcoBm7SElL0b9RvV1fhDDu4pOqdk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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