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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e838523d19cfdad032ce181b08c2ca6b4737bf560e9f12c0b40f2281dc3242f' 
  AND token = 'UGNpl1B29IRhfA9yjzurpHHlnZRZ5EY5SxYFq1vlAZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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