Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbe0c546adef8b7c5fa1848e7199fb98cfae8d6efc677338c63ac05d0d896bcd' 
  AND token = '2cIQJsTw917ZcoIvV0MldVbt4/BTnWkDQNmsrfYZpqo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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