Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33a0daef2fab37d2077435fef9a444b8ffab1d65c00ea24dd976b4201789b7cd' 
  AND token = 'Pbvy251a6KCjb0F+4clOoZ2nCiBQhU8hRQy2c2ynb5M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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