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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fde2f91d14efd20fc2a02cc770221345acea2acb41e62553526633cb4f2946a3' 
  AND token = 'FE8K4mmX48pJt0rHKsCzxhoaYC+ly0sW+dErt40CfHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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