Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4d84ddedaa1fe8e1cee84151a5c599d59cd67fd2bdfac7cf88769ca215bad4be' 
  AND token = 'Gcw1U/uvU6TrrrfmK6SWhzsnpmQs9DD0OnT1D7cLu1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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