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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afde8b8a9479e5849a3ade0323fdcc2242b3116d8cec26253cb45992c673efa1' 
  AND token = 'e4RTJ69XeQuT0+iN3PypOr78TNHmEDQevWpJJkEEZKk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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