Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec0373f327d9099e40de47bfae9f2faefb095ecf406567b0f8afcb27e8f0c983' 
  AND token = 'fOk9QEbZ1VCe0cRb1tulO3Hlt5yxSu44rfcG//KYWuE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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