Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7385e628eaf94055a20e0679c7b2c1f627f50c8a72c504e490be8362acbd24c2' 
  AND token = 'FsqSdAJXiO13JuDx8RWy6LgNRoUmAhst3ln3MitYLMg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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