SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'deec3c4d3bdb425161f89660a9b7155ac3845bf2bbf2c8dc87cf5030f22dd04a' 
  AND token = 'JAY+dfGPKMG9rbc5BAbw9KnuRqp5RZjOuv1issv37mU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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