Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba6ad63dce20962e35f99f0f655070c3199cd51e8fd551cbb8faf265db0ed854' 
  AND token = 'FjbA6j2DM6tlAgCB8tjuz5GOPBXlanITxggUyFvyxic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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