SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fa38caf3b915a19efe41487abc28ab019685d4a9d04d46b49779f37e1830eb58' 
  AND token = 'KZXYHBvwlDKlqljA9zctpi/tK475R16n4OU0h51m6Ws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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