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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '43e3cbce4d0888ea1d4c29e9ed140454e12039c6126b8988eddcaa3dc39531ed' 
  AND token = 'kSbnOIQQm4gMbjNQr3/3NDiNns5NZT6WvEf1bc8yzZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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