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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60d7a76496c05f8a2ed4872f3d6a8153d9c95498eb91e07f2e6fc7667c5cdfb4' 
  AND token = 'HsqsjRslD44PSPbrKqtKPCnI0ENXHPTWHAXCnIJg5wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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