Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c464d5049f5a0ac541691ad0f0df37b0be9b178b1ac60591bb9fdc6efe3cb7e6' 
  AND token = 'b3T2J6utdx6DsU3Neq4Rsf1/SG1E0I/k6VQ4sO0FnyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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