Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00a136ad167bfbcc99083bc701cec6619b6d8701e3cb1a4d2521235088570286' 
  AND token = 'ufxo0Ykjt3rWvfVQiLiCWMRg27LNX7Dalytpih65p6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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