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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'e1d551cadeaa51a1cc5aea340f4df6dfcaaf8a48f102b6dd361c54084c87d7e6' 
  AND token = 'vw30gVyvQVuK/14hRmlgS6/LExei3F5rAsSMN31fens=' 
  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"
    }
  }
}