Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'bee7c76a666c6aaa0100e463ad04f29114c08baccafa4a8b40fd91244a3112f0' 
  AND token = 'ED47r1EaGLAJBn3fcowKmwMC2tMHUdhBs/rnBIa+3jo=' 
  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"
    }
  }
}