Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c64f1c798335aed047355c1fd6dd9e9032e4a198ff605df0276a785294ca682b' 
  AND token = 'dCco69bC9BbKAZIXBwSeGLoRS/tcivXybmEtzgTZ45g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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