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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '107876bfab6ec4a28da76642bd182e8382132d5e0ebd01179366c8d5d93fe75c' 
  AND token = 'zPCI9wJXWLbNNkNTW2HDTC2F1CYrc3PH5S/Qbyigmpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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