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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '2c29ed0048d201de49ecaa7002e748641de75b43bf9dd757bf8e5cd6fee7c461' 
  AND token = 't8bGJ1Au6u41qSmarYETO9wpeI0q9jwZZZtjok4E/dA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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