Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '588894bea601908d92758ba71c53386bb614b1f637b16599784757c2b0b9c7b4' 
  AND token = 'vWyJ2AfQX1GmNrP2tYYbBFjANuuwPRiwPh12E46RJLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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