SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32f0501a7ddc101acf013e86797ef5c54d54976185e4d43dbc6fdfe6232017b7' 
  AND token = 'k/+gciiFX+dFh8DEFAGRmIf4XY3cA6vVO9GaRTQKrAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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