Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'd0b3b8c508877275a886df4eac4771f607eab54e1d9eeacedd9ee659ec1beae5' 
  AND token = 'jGQRl+x4s/xXYUiMSY8dLZ8QgfVr1CsqiweEsZs7QkM=' 
  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"
    }
  }
}