Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '75f32f0ff40c91acf5662dea6716926f0e9b39f9316cbfa18507a79f5451812e' 
  AND token = 'QQBSVeFMVE6vLEm5S1O2tNBEFw45XJK5C0aNnmeIqdI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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