Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c2c9cc032f7bfaa7af569a5527905fbcc940273a058ca41ff987d2704d9f8d5' 
  AND token = 'hICTGbTA5fAb3hU8c4pak9NCTxO1x+wawUZ341iHZbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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