Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c178d6249126e4b0c3a47e6b94b2dc5b2f645d332776daf91f6cbfe36b9525b4' 
  AND token = 'a1c7+UTUOa9D1vx0M+HcvopylOpMzIhm9k4jJSxXffY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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