Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '083acd5f2bd2b591284078bd4e5d4c3e61c0021a2a6bf9a176e9436b0e1c474d' 
  AND token = 'n46OiBFZdFxs+8FrqwWHZKfXZ8ttizf3aJKirx2CyBI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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