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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee09375c36d21febab93e173ba1a42ed3ba7e5b347be8d998fe7b67f8b6b1ae1' 
  AND token = 'Q9/xBTxjAWrTO2mTQUqAFmCwYM3VwacL49ndQzZj38k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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