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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e5f95bb3f71c4ea5f1377d7059553fe5daa199d433c927a47fb030bcc4eb7c81' 
  AND token = '2iAE3faYTsCppWHQzFyOla+Mcve25UQWjAhQSKxTnWA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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