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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3543a3e18f82001747d11d514f05de7a30f5ca73e05902ad051947d7df75880' 
  AND token = 'X0KNFq9IoJBZhxb0awa6Ra9r7t60fg4iSBcdr3Dbgo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00088

JSON explain

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