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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '162296e6cc32ef6e1b2c571a398cbbab9786b9797d26d7d221ab1f79d558233e' 
  AND token = 'qlz+pw+u5+dnGZnFdpXIyJ5aW3qof7EOpFI7ZiAA4a4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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