Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c303cd6496e4e88eb2aa98b02d0f808633a404baf302ec83d9787836eca66c0' 
  AND token = '0pLmwIh2cSC1Q6QvBrVUHNzZN9vM8DJR3o5vaJYy/7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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