Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '606447caee54ec8615d8f5ae37021dd97483604ecb31e1554c9a6771be5a01dc' 
  AND token = 'Z7v0RoatZA6jU47lKzXJ87FqLiqBxMA7vCC7ybObUis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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