SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '57997c8d533367d8d686ca0c7eb2a42ef7cdf2065dc4fec8a2594b5a88a8df73' 
  AND token = 'VtCe/CnsrbQIX0YuA+q9QsJ3a2RmqzPJXDZeCO3+JDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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