Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30073fb9d1ee3d5984e27db06d6713844f10ec529cebfc007912001e32b4fba5' 
  AND token = 'LctphhV/8x3ij1cBBNtTC8qhZWP+M3/5fax90/vR7o8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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