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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'a0b400f000c8886221344782d60edec1b7b2f143b1b118289795b4429ab6c456' 
  AND token = '2kzOAAS+Y9Vf0xgjJUzuBornbXjnYOqH6ni5FxR2A7Y=' 
  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"
    }
  }
}