Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89e268cd5fb7c4b5ca108fbc134cca56ca0837cfc7a291017dc1e09ccece0bb5' 
  AND token = 'hziJqHygrXVT2TjXA+FlpCmeCO6RuTfImk0PYcRfJtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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