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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '282b21433f6f9eab6eb2724e6a4d2617f5afc5665a13a92f456c4b643db56abb' 
  AND token = 'oQeXmge3tvChDQYpx1Wrk6mGSokYPrJYmN1V3DVD7rY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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