SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c13ac84ad1cb828376449fb05b8abda158649c84a5c47b971117e3d842acb25e' 
  AND token = 'EqTJHYLdhA8JWk+qtcb+H+GPs/JPoGAMBCly/wTyx3w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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