SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '345648f34119e78ab8c1164e6d2751a0ba6e8a948f454e5f993a3b2f6c4029d6' 
  AND token = 'dX3+CmtS6PqTww5ZQavpnK6J+QH/fJJdyuHGnFrZG6c=' 
  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"
    }
  }
}