Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcc2f888801878269082d6a1294099036d21acf901e05964dae7a7a03b60bac7' 
  AND token = 't1dvOfpgjxRqdIHnIN+fPl5ye5i5xGJaJFGFF88XCQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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