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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '31f25ce6972f714244a986cd6282eaabc86e426947ca9c905a8f10ce4c72ce22' 
  AND token = 'VlTArAaC1O9gO4zA4M1yyBqq8LHwKleXkjEyCw6pDQo=' 
  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"
    }
  }
}