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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '13a1018dd74cbfd84c75565cb194c555ffcbaee71a3828ef6cdcafb3f9d95b06' 
  AND token = 'yke5N1JypaAdMkSVK58VXLsD9u1eRtg7+zR+ghCjyco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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