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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '4fd0e93a80ca3a8000b87537ad4b7402c25ece4afdb21b38408e45a0a8455d9a' 
  AND token = 'mgAbznf3K96ra/w2VkR/qBTr9CC1xkn6bdXyepzniRc=' 
  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"
    }
  }
}