Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ad4238326309f8b8757072f30cdb84abc3bfde389c726824266e1117fafb7921' 
  AND token = 'Yx1cnoZ6ziUcOEUhURPs70479r3lavpJqnMRWw88p7U=' 
  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"
    }
  }
}