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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3aa1b4f571e22bd057534c61c00c43a49f0764cbac9c105b5dc062d644978b06' 
  AND token = 'sCG3pJL8t9QM58wwG0ae6JRSTjhO4nNyWmw/JIOa5RE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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