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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4f4fe9f83ad1e3aa48df68bf7dbcce64cf06fd0b3e0dd4418000f27581067fd3' 
  AND token = 'v/O2WhOXEiXVzSRo6thpQil+wF0LoIhcN+cXuJjJulo=' 
  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"
    }
  }
}