Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f47d81a926b11d86560676a9ca3e79fb2636b80edaefff5793305639f0ae6d2e' 
  AND token = 'zzdrJDeyGC/GlRf0tMHOqlmegEL7bp/E6XN+JpWpa00=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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