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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad1ee07d4c4c01aeac2dc6b9bd1c83eab81d1ed11faae67c9e700093e5afeac5' 
  AND token = '31L9XH6Wg+ySJKbCSA+BvhGr3lxRipXGTDimasZDJAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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