Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7f398322ceed02d4d13982b4df651ca7262f9f4bab8302910c34853b1e3ee8b' 
  AND token = 'yTxD/AWL7gxdDITozUn5kQYrSri9yzynIOFRpc5MenQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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