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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f7d94683df0e5cb18b23bc83630738d213ce56e17bb2f360d8f001efc746de65' 
  AND token = 'orbE/yeqd8BZynqp7/hEbEEoMPScyFUFeEGKLuw3SZ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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