Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bfb527a8948605788833b188d615f38ad84838bc0008a55d6f538a2c4001636' 
  AND token = 'Cev/4hynMzojCn4rSpf96Eie7I0aMyfu+6SQ6Ovv1X0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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