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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '711680fc36032004e309db19172ddbd0dc03822e8c785e9dce593dbfe5c512c3' 
  AND token = 'ZAuVUihfX5xAFw5Oqm33IBx3esdzJvPQ0Bu3osdy0eA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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