SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bd9cb6861962a98caae114d37c285db6914771e0b1e7cf19b2c26b4defb1f5d0' 
  AND token = 'ye/Hlp85z5SgoyKIW+7ZvMP1YIydm1siG/H5VNCqnHw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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