Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85ca39fd5d852cbe284c56242429d32b139a7ebb9c65bdf04e0e1b4673721481' 
  AND token = 'iC/u8i8lkUxaV7p4sZ4y8MrFwG9oBRrJtEolS6mhs2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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