SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a68ae04d41b94d39c152ec33182525971f2b77115b89b308b0813444768b5cbb' 
  AND token = 'K/OnA0MBhRZwTyEsqGpFL0WI5F7O7zox3d4zlTL+BI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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