Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55a3e91eb5941b4e8217f40b1930b56850d8717a7289a987bb9d5360a1fedfdc' 
  AND token = 'P1puuRiFRpC8tbITfz21Owc2VXJoZgfIK+6gSqiiKNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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