Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afaa808110b8166b5fb6b173cff10bc9e6053efbf0b37b874fa5c945afc1d9d4' 
  AND token = 'Ca9vk2BlsaHLeBH5Hbstkn+umbQg59/RKninL4J1TnE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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