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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed6dd6cb056e10872c62712303af5a794f9651bbf701ab51210a7fd71143e17e' 
  AND token = 'AnoBDduRwo3Dl7R7Kh1RQO86XXp1jyRYi3bu/GSIA5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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