Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e45bacd58fe3934f926a1bce3f5cd6817af662d0ec553850b00404727e680b04' 
  AND token = 'GhGL9jjftyqwmSJQcyDDaqUy/TagShrLianFCm5rB6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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