Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40f7c64ff47f7037d9aeea114dcf10d32e1fd918e9e3b2eeebb3ec4fd9bc4252' 
  AND token = 'z9E4rrDqkPrXBFYrLq025IDwEEJW9DnC51Q7QapruLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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