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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bee68c5c9eae83c70a86646b18c190d7c6102a1ebb7e99a2a141fcac1899c4a' 
  AND token = 'NZxVAdTQsRSVVS5tBv2oZQtq1qWEOTt1D4HRGUeU1IM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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