SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2a41f419f27adbcda4689bf631082595736ce71983c5bb97e25c78be3d83305c' 
  AND token = 'XSRlxejmP+GjXE5ioBSLrC8LQ58Z5Ovq4PpCwL/Ds5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}