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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'c97a5afa8f4f524c900fe590ec2d58be6a77949dcf8eaf2f549d7b08940a8f1b' 
  AND token = 'uAWVaBZyedceLiM9t8bziZxO9RcHcyuww/yJ2uVYzp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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