SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2365c53c23fdb601c16010ec2ecf93fc457384703e9fdb85858c8b2fb971d36f' 
  AND token = 'PVQJ4/LYB5XC3osqobF5DY+w6Nd/CXPVU7WBQGaAgFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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