Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e52127056d92a4e55eb51bf5a60143d953638c8148b3297d10b8bf66643be756' 
  AND token = 'C4BuTnwPoHWWjpUssPQ7SFt13Ba4FCoP23hJDdhvn34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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