Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a9470d81d7224f52830c2c012f935695a37b700907773ef96009585bfd1d2f0' 
  AND token = 'x7IQ5zaXAKqvmvWLekE6AGKqC0/3lOS6p95rojsSAh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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